A/B Test Significance Calculator
Check whether your A/B test results are statistically significant — enter your control and variant numbers for an instant confidence reading.
Open toolTools for planning and reading your own advertising
Free calculators that do the arithmetic, each one sat beside a plain-English guide explaining how it reaches its number and where it can go wrong. They work out sums, not strategy, so the reader still decides what the figures mean for their own budget.
Calculate your A/B test significance Calculate your ad budgetCalculators built for UK advertising decisions
The tools below take numbers you already have, a budget, a CPM figure, a test result, and turn them into a specific answer for your situation.
Ad Budget Calculator
Estimate how much to spend on advertising by channel — enter your goals and get a realistic UK budget range based on typical platform costs.
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CPM & CPC Benchmark Comparator
Compare your campaign CPM and CPC against UK benchmarks by channel — paste your numbers and see where you stand against industry averages.
Open toolGuides for each tool
Each calculator has a plain-English guide beside it, explaining what it does, how it works out its answer, and where readers commonly misread the result.
How to Use the A/B Test Calculator | Advertise.co.uk
How to Use the A/B Test Calculator
A step-by-step guide to running A/B test significance checks on your ad campaigns — what to enter, what the result means, and when to act on it.
Read guide How to Use the Ad Budget Calculator | Advertise.co.ukHow to Use the Ad Budget Calculator
How to set an advertising budget that matches your goals — a guide to the inputs, outputs, and assumptions behind the Ad Budget Calculator.
Read guide How to Use the CPM & CPC Benchmark Comparator | Advertise.co.ukHow to Use the CPM & CPC Benchmark Comparator
What CPM and CPC benchmarks mean, how to read yours against UK averages, and what to do when your numbers look high — a guide to the comparator tool.
Read guideWant the fuller explanation first?
Browse the full set of guides for context on budgets, benchmarks and testing before you commit spend.
Two calculators, each built to answer one specific question with your own numbers
Whether you're checking a test result or setting next quarter's spend, a calculator only helps if you trust the maths behind it and still read the output with judgement.